I'd say figure out what she likes and go from there... don't worry about the aptitude for now. Don't be afraid to try multiple sports, and also don't be afraid to play multiple sports at the same time. The best athletes I ever coached were multi-sport athletes in HS and remained multi-sport in college.
Make sure she doesn't neglect her studies: grades matter for recruiting in the Ivy League, the little Ivies and the top-tier state schools. (I don't have experience with other schools.)
Last of all, you can't coach desire. If she doesn't want to play out of her own volition, don't drag her kicking and streaming. You can't want it more than she does.